Is GEDifying just a custom ROM that someone has built ? If so it will be up to the Dev to update it.

GEDifying was "sold" to me as a way of turning the Xoom into a "Google Experience Device", rather than having it tied it to the whims of Motorola, so that it would get the latest updates direct from Google.

I received one or two updates, but I would have expected to receive the latest updates automatically as Google pushes them out.

Unfortunately, Simon J Stuart's website appears to be down, which is where the instructions were obtainable from.